arris

American  

[ar-is] / ˈær ɪs /

noun

Architecture.

1. a sharp ridge, as between adjoining channels of a Doric column.

2. the line, ridge, or hip formed by the meeting of two surfaces at an exterior angle.

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arris British  

/ ˈærɪs /

noun

1. a sharp edge at the meeting of two surfaces at an angle with one another, as at two adjacent sides of a stone block

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Etymology

Origin of arris

1670–80; < Middle French areste; arête